# Last9

> Comprehensive documentation for Last9's observability platform.

Last9 is an observability platform built for high-cardinality telemetry. It offers a developer-first control plane to manage logs, metrics, and traces, supporting OpenTelemetry, Prometheus, and over 100 integrations. With real-time alerting, data pipelines, and AI-native features like the MCP server, Last9 helps engineering teams debug, optimize, and scale systems efficiently.
Our documentation covers everything from getting started to advanced integrations and features.

Key facts:
- Supports OpenTelemetry, Prometheus remote write, AWS CloudWatch, Datadog agent protocol
- MCP server available for AI agent integration with Last9 data
- Usage-based pricing with no per-seat fees
- Named a Gartner Cool Vendor in Observability

## Documentation Sets

- [Abridged documentation](https://last9.io/llms-small.txt): a compact version of the documentation for Last9, with non-essential content removed
- [Complete documentation](https://last9.io/llms-full.txt): the full documentation for Last9

## Notes

- The complete documentation includes all content from the official documentation
- The content is automatically generated from the same source as the official documentation

## Optional

- [Getting Started](https://last9.io/docs/introduction/): Quickstart guide to send your first telemetry data to Last9
- [Integrations](https://last9.io/docs/integrations/): 100+ integrations including OpenTelemetry, Prometheus, AWS, Kubernetes
- [Alerting](https://last9.io/docs/alerting/): Set up alerts, SLOs, and notification channels
- [Traces](https://last9.io/docs/traces/): Distributed tracing, span dependencies, and flame graph analysis
- [Logs](https://last9.io/docs/logs/): Log exploration, filtering, and correlated telemetry
- [SLOs](https://last9.io/docs/slos/): Service reliability monitoring with SLIs and error budgets
- [MCP Server](https://last9.io/docs/integrations/mcp/): AI agent access to Last9 data via Model Context Protocol
- [FAQs](https://last9.io/docs/faqs/): Frequently asked questions about Last9
- [High Cardinality Guide](https://last9.io/guides/high-cardinality/): 8-part guide to high-cardinality observability: concepts, dimensionality, streaming aggregation, cost control, and anti-patterns
- [High Cardinality in Prometheus](https://last9.io/blog/how-to-manage-high-cardinality-metrics-in-prometheus/): How to find and reduce high-cardinality metrics in Prometheus: tsdb status checks, relabeling, aggregation, and scrape limits